Fuel-control system for burners.



all

invention applied toa rotary Fig. 2 is a similar representatlon of aDIES, U Sdhl in a. near, or sun ranersco, enrrro u came it t h t:

WUEL-UQNTUL avert in: mm BWNE 1n;

tpecttleatlon of JLetteru Patent.

n, arena re a Patend hpr, f

hpplleatlou tied November at, Milt. herlal lto. rotate.

To all whom it may concern."

Be it known'that ll, mnmn A. Donna, a citizen of the United of the citand county of San Francisco, State of alifornia, have invented a certainnew and useful Fuel Control System for Burners, of which the followingis a specification.

The invention relates to devices for controllin the flow of fuel toburners, and particular y to burners which include an electric motor intheir operating mechanism.

An object of the invention is to provide means for stopping the flow offuel to the burner when the electric circuit is opened or when thecurrent in the circuit decreases beyond a predetermined value.

A further object of the invention is to providemeans for simultaneouslyopening the fuel line and closing the ignition circult.

The invention possesses other advantageous features, some of which, withthe foregoing, will be set'forth at length in the following descriptionwhere I shall outline in full that form of the invention which haveselected for illustration in the drawing accompanying and forming partof the present spec1 catlon. In said drawing ll have shown one specificform of my invention, but it is to be understood that do not limitmyself to such form, since the invention as expressed in the claims maybe embodied in a plurality of forms. In the drawings T have shown myinvention applied to a rotary burner in which the fuel is atomized by arotating element to which the blower for supplying air for combustion isattached, so that both are rotated by the same motor, but it is to-beunderstood that the invention is equally applicable to all types ofburners in whlch an electric motor is used,' either to atomize theliquid or to introduce the air for combustion.

Referring to said drawingsz' Figure 1 is a partly diagrammaticrepresentation of the fuel control system of my burner.

modified form of the system.

.The burner consists of a casing a rotating element or on 3 therein forproducin a fuel spray,- whlch is driven-by the electric meter 4, throughthe sh 5. e-

States, and a resident burner and the 'mediately falls, stopping '2having cured to the shaft below the cup is a blower which is rotated bythe motor to induce the necessary air for combustion into the canng. Aspark plug 6 or other ignition device 1s arran ed in the casing forigniting the combusti 1e mixture.

Fuel is fed to the burner from the supply tank 7 through the conduit 8,and a pp 9 arranged in the conduit andconnected to the she 5 operates asa meter to measure the fuel fed to the burner in proportion to the speedof the motor. Means are rovided for opening and closing the conduit asthe motor circuit is closed and opened.

Arranged in the conduit 8 between the I pump 9 and preferabl close tothe burner, is a valve casing 12 aving an inlet passage 13 and an outletpassage 14:, formed at the bottom of the casing. Arranged in the casingis an iron core or plunger 15 provided on its lower end with a valve 16adapted to seat in and close the outlet passage 14. Connectin the upperend of thevalve casing with the conduit 8 on the tank slde of the pumpis a by-pass conduit 17, and the core 15 is provided on its upper endwith a valve 18 adapted to seat in and close the opening of the conduit17 into the casing. The core 15 is so constructed that the fuel may flowthrough the casing past the core, either by making the core smaller indiameter than the casing or by providing the core with passages 19.Surrounding the casing is a solenoid 21 which, when energized, raisesthe core, unseating' valve 16 and seating valve 18, permitting the fuelto flow to the burner. When the circuit through the solenoid is opened,the core imthe flow of fuel to the burner and causing it to flow throughthe by-pass conduit 17. The solenoid 21 is connected in series with thebattery 22, the motor 4 and the control switch 23. Connected in parallelwith the motor is' a rim fuel which is subsequently pumped by the pump,due to the momentum of the motor and the cu 3, is diverted through theby pass condult. When the burner 1s used in connection with a steamboiler operating under. widely varying loads, as in a motor vehicle,which is provided with means for automatically opening and closing themotor circuit in accordance with variations in boiler conditions, thedevice ofmy invention operates to shut off the fuel instantly andthereby permits of a close regulation of the casing by the pump flowsout through the b -pass.

I c alm: v

1. The combination with a liquid, fuel burner, of an electric motoroperatively associated therewith, a circuit for said motor, a conduitthrough which fuel is conve ed to said burner, a pump in said conduit, eectrically operated means in said conduit between the burner and thepure and connected to said circuit for controllmg the flow,

of fuel through said conduit and a conduit connectin said means withsaid first con duit on t e intake-side of the pump,

2. The combination with a liquid fuel burner, of an electric motoroperatively associated therewith, a circuit for said motor,

.aconduit through which fuel is conveyed to said burner, a pump in saidconduit, an electrically operated valve in said conduit between the pumpand the burner, and a byon the intake side of the pump. v

3. The combination wlth' a liquid fuel burner, of an electric motoroperatively associated therewith, a circuit for said motor,

a conduit through which fuel is conveyed 'to said burner, a pump in saidconduit, a valve in said conduit, a by-pass connecting said valve withthe conduit-Yon the intake side of the pump and a solenoid associated.with said valve and connected to said circuit. a

4. The combination with a liquid fuel burner, of an electric motoroperativelyassociated therewith, a circuit for said motor, a conduitthrough which fuel is conveyed to said burner, a pump in said conduit, avalve casing in said conduit between the burner and the pump, a by-passconnecting the valve casing with the conduit on the intake side of thepump, a valve in said casin for controlling the flow of fuel to sai noidassociated with said va ve.

5. The combination with a liquid fuel burner, of an electric motoroperatively associated therewith, a circuit for said motor a conduitthrough which fuel is conveyed to sald burner, a pump in said conduit, avalve casing in said conduit between the burner and the pump, a by-passconnecting the valve casing with the conduit on the intake side of thepump, a valve in said casing adapted in one position to stop the fiowjoffuel to the burner and in the other osition to stop the flow of fuelthrough the y-pass, and a solenoid associated with said valve andconnected to said circuit.

In testimony whereof I have hereunto set my hand at San Francisco,California, this 17th day of November," 1917.

- WILLIAM A. DOBLE. In gresence of G. Pnos'r.

pass connecting said valve with the conduit -burner and through saidbyass and a sole-

